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v3.23.1

Fair value of financial instruments and investments - Marketable Securities (Details) $ / shares in Units, $ in Thousands | 1 Months Ended | 3 Months Ended |
--- | --- | --- | ---
Jan. 31, 2020 USD ($) $ / shares | Mar. 31, 2023 USD ($) fund | Mar. 31, 2022 USD ($) | Dec. 31, 2022 USD ($)
Equity Investments |  |  |  |
Net unrealized gain (loss) on equity investments |  | $ 2,166 | $ (6,477) |
Redemption of marketable securities- equity investments |  | 2,196 | 2,423 |
ClearPoint Convertible note |  |  |  |
Purchase of convertible note |  |  | 39,035 |
Unrealized gain (loss) on convertible note |  | 59 | (1,542) |
ClearPoint equity investment |  |  |  |
Equity Investments |  |  |  |
Net unrealized gain (loss) on equity investments |  | (100) | (1,000) |
ClearPoint equity investment | Quoted prices in active markets for identical assets (Level 1) |  |  |  |
Equity Investments |  |  |  |
Fair value of equity investment |  | 10,900 |  | $ 11,000
ClearPoint convertible debt |  |  |  |
ClearPoint Convertible note |  |  |  |
Purchase of convertible note | $ 10,000 |  |  |
Conversion price - convertible note | $ / shares | $ 6.00 |  |  |
Term of convertible note | 5 years |  |  |
Unrealized gain (loss) on convertible note |  | 100 | (1,500) |
ClearPoint convertible debt | Recurring basis | Significant other observable inputs (Level 2) | Deposits and Other Assets, Noncurrent |  |  |  |
ClearPoint Convertible note |  |  |  |
ClearPoint convertible debt security |  | $ 15,300 |  | $ 15,200
Mutual Funds |  |  |  |
Equity Investments |  |  |  |
Number of mutual funds denominated in a foreign currency | fund |  | 1 |  |
Net unrealized gain (loss) on equity investments |  | $ 2,200 | (6,500) |
Redemption of marketable securities- equity investments |  | 2,200 | 2,400 |
Unrealized foreign currency gains (losses) on equity investments |  | $ 300 | $ 700 |

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